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https://issues.apache.org/jira/browse/ZOOKEEPER-790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12890451#action_12890451
 ] 

Hadoop QA commented on ZOOKEEPER-790:
-------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12449972/ZOOKEEPER-790.patch
  against trunk revision 963957.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 6 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac 
compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of 
release audit warnings.

    -1 core tests.  The patch failed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: 
http://hudson.zones.apache.org/hudson/job/Zookeeper-Patch-h1.grid.sp2.yahoo.net/150/testReport/
Findbugs warnings: 
http://hudson.zones.apache.org/hudson/job/Zookeeper-Patch-h1.grid.sp2.yahoo.net/150/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Console output: 
http://hudson.zones.apache.org/hudson/job/Zookeeper-Patch-h1.grid.sp2.yahoo.net/150/console

This message is automatically generated.

> Last processed zxid set prematurely while establishing leadership
> -----------------------------------------------------------------
>
>                 Key: ZOOKEEPER-790
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-790
>             Project: Zookeeper
>          Issue Type: Bug
>          Components: quorum
>    Affects Versions: 3.3.1
>            Reporter: Flavio Paiva Junqueira
>            Assignee: Flavio Paiva Junqueira
>            Priority: Blocker
>             Fix For: 3.3.2, 3.4.0
>
>         Attachments: ZOOKEEPER-790.patch, ZOOKEEPER-790.patch, 
> ZOOKEEPER-790.patch, ZOOKEEPER-790.travis.log.bz2
>
>
> The leader code is setting the last processed zxid to the first of the new 
> epoch even before connecting to a quorum of followers. Because the leader 
> code sets this value before connecting to a quorum of followers 
> (Leader.java:281) and the follower code throws an IOException 
> (Follower.java:73) if the leader epoch is smaller, we have that when the 
> false leader drops leadership and becomes a follower, it finds a smaller 
> epoch and kills itself.

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